drm: Checking of the pitch is only valid for linear formats

raspberrypi inclusion
category: feature
bugzilla: 50432

--------------------------------

framebuffer_check was computing a minimum pitch value and ensuring
that the provided value was greater than this.
That check is only valid if the format is linear.
Signed-off-by: NDave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/gpu/drm/drm_framebuffer.c

@@ -217,12 +217,16 @@ static int framebuffer_check(struct drm_device *dev,
 		if (min_pitch > UINT_MAX)
 			return -ERANGE;
 
-		if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
-			return -ERANGE;
-
-		if (block_size && r->pitches[i] < min_pitch) {
-			DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
-			return -EINVAL;
+		if (r->modifier[i] == DRM_FORMAT_MOD_LINEAR) {
+			if ((uint64_t)height * r->pitches[i] + r->offsets[i] >
+								UINT_MAX)
+				return -ERANGE;
+
+			if (block_size && r->pitches[i] < min_pitch) {
+				DRM_DEBUG_KMS("bad pitch %u for plane %d\n",
+					      r->pitches[i], i);
+				return -EINVAL;
+			}
 		}
 
 		if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) {